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can you please answer no. 3
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- A Styrofoam box has a surface area of 0.80 m and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0C, and the outside temperature is 25C. If it takes 8.0 h for 5.0 kg of ice to melt in the container, determine the thermal conductivity of the Styrofoam.Give an example of a physical property that varies with temperature and describe how it is used to measure temperature.1. A container used to store ice is made of wood 5.0 cm thick and has an effective area of 12,000 cm2 and thermal conductivity of 0.00027 cal/cm2 -sec-C/cm. How much ice inside the box would be melted each 24-hour day if the outside temperature is 25C and the temperature inside the box is 5C. Include FBD
- 11. A tank of 10ft3 capacity is half filled with glycerin. The weight density of glycerin is 78.6 lbs/ft3 and its specific heat is 0.57 BTU/lb-°F. (a) How much heat is needed to raise the temperature of glycerin from 40°F to 70°F? (b) If the heat supplied to the glycerin is at a rate of 750 BTU/min, at what rate does its temperature rises? 12. How much joules are needed to change 100 grams of water at 10°C to steam at 120°C1.A container used to store ice is made of wood 5.0 cm thick and has an effective area of 12,000 cm2 and thermal conductivity of 0.00027 cal/cm2-sec-°C/cm. How much ice inside the box would be melted each 24-hour day if the outside temperature is 25°C and the temperature inside the box is 5°C.1.What is the heat in Joules required to raise the temperature of 25 grams of water from 0 °C to 100 °C? What is the heat in calories? 2.An unknown metal weighing 900g at an initial temperature 140oC is placed into an insulated container holding 3L of water at an initial temperature of 60oC. The water rose to 65oC. What is the specific heat capacity of the metal?
- 1. An ice cube of mass 65 g is taken from a freezer at -15o C and dropped into 125 cm3of water at 85o C. What will be the final temperature of the mixture? The specific heat of ice is 0.5 cal/g.o C and latent heat of fusion of ice is 80 cal/g.2. How much heat is given out when 85g of lead cools from 200°C to 10°C? The specific heat of lead is 130 J/kg • C°?1. What is the final temperature if 200g of copper with a specific heat of 0.1 col/gC at a temperature of 80° is added to 200 g of water at 20°C that is held in a 50-g aluminum cup having a specific heat of 0.22 cal/gC.
- A glass is filled to the brim with 300.0 mLmL of water at 100.0 ∘C. If the temperature of glass and water is decreased to 20.0 ∘C∘C, how much water could be added to the glass? *answer is not 5.04 mLHow much heat ? would be needed to completely evaporate 33.5 g of boiling water at a temperature of 100 ∘C? Express the answer in units of joules. The latent heat of vaporization for water at 100 ∘C is 2260 J/g.1. When the aluminum can-water-metal block system reaches the equilibrium temperature of 30 °C, 20 grams of ice at 0°C is placed in the can. If the latent heat of fusion is 334, 000 J/kg, the amount of heat needed to melt the ice is? 2. How much heat is required to turn 50 g of water into steam at boiling point? Latent heat of vaporization = 2.256 x 10 ^6 J/kg